release: 0.34.0

[stainless-app]

Automated Release PR

0.34.0 (2026-02-13)

Full Changelog: v0.33.0...v0.34.0

Features

• Add error_code field to ManagedAuthSession and related components (9d160d7)
• Allow arbitrary viewport dimensions (6463d9f)

Chores

• format all api.md files (c4ea333)
• internal: fix lint error on Python 3.14 (96a4f24)

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Note

Low Risk
Mostly version/documentation/codegen updates plus additive optional fields; low chance of breaking consumers aside from minor typing/doc/tooling behavior changes.

Overview
Bumps the SDK to v0.34.0 and refreshes release metadata (manifest, changelog, and OpenAPI spec pointer).

Adds a new optional error_code field to managed-auth flow models (ManagedAuth and ConnectionFollowResponse state events) to expose machine-readable failure reasons. Updates browser and browser-pool viewport documentation/types to indicate arbitrary viewport dimensions are accepted (with a list of tested configs), and tweaks tooling by expanding the format:docs script to format all api.md files and silencing a Python 3.14 typing-lint overlap warning in _compat.is_union.

^{Written by Cursor Bugbot for commit 38e5906. This will update automatically on new commits. Configure here.}

[stainless-app]

🧪 Testing

To try out this version of the SDK, run:

pip install 'https://pkg.stainless.com/s/kernel-python/6463d9fdb94477867d82fd69630688878c79b182/kernel-0.33.0-py3-none-any.whl'

Expires at: Sun, 15 Mar 2026 22:15:25 GMT
Updated at: Fri, 13 Feb 2026 22:15:25 GMT

[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

^{Bugbot Autofix is OFF. To automatically fix reported issues with Cloud Agents, enable Autofix in the Cursor dashboard.}

[cursor]

Docs formatter now depends on Bash

Medium Severity

The format:docs script now runs through bash -c, which introduces a hard Bash dependency. Environments without Bash (notably common Windows setups) can no longer run format:docs, so local formatting workflows fail even though the previous python-only command worked cross-platform.

 

[cursor]

Docs formatting scans unintended directories

Medium Severity

format:docs now expands $(find . -type f -name api.md) without excluding directories like .venv or build artifacts. This can pass third-party or generated api.md files to ruffen-docs, causing unexpected edits or failures outside the project’s intended docs set.